Massac County RainfallUnited StatesILMassac County15%Metropolis 15% Chance 20%Brookport 20% Chance 15%Mermet Lake 15% Chance Big BayBoazBrookportCretaceous Hills Nature PreserveFort Massac State ParkHillermanJoppaMassac Forest Nature PreserveMermetMermet LakeMetropolisMetropolis Municipal AirportNew ColumbiaRound KnobSamothShady GroveUnionville